Why do people seem to ignore expected odds?

[Buckmulligan]

For some reason, when deciding whether or not to make calls in a lot of the posts I reed, people consider pot odds and implied odds but not expected odds. It seems like people make a habit of calling early bets when a late position raise seems very likely without taking that into account. For example, say you have KQs in MP1 and raise and MP3 3 bets and button Caps and SB calls the 3 cold... you call. Let's say there is now 8.00 in the pot and the flop comes AT8 rainbow, none of your suit and the guy from the SB, regardless of his fishiness leads out. I see a lot of posts saying that you can't fold here because you are getting 17:1 on your gutshot, but it seems like a blind conclusion. Clearly, you can expect a raise from at least one of the players acting behind you, and 35% probably a cap, so you end up seeing something like 25:4 for your gutshot. This is an example of people neglecting the nature of expected odds in big pots; to me, when it's a close call and a raise behind me seems inevitable, the lay down seems easy, but lots of players I see posting only focus on the money that is currently in the pot or the money they will win if their hand hits.